Bobbin socket

ABSTRACT

In a bobbin socket having a metal ring mounted between a bobbin body and a socket body, said ring has such a substantially S shape in vertical section that it can be integrally mounted to the upper and outer periphery of the socket body so as to protect the flange surface of the socket body from plastic deformations and damages which might otherwise be caused by the forced pressure of the lowest periphery of the bobbin body.

[ BOBBIN SOCKET [76] Inventor: Isao Sato, 2-17, 2-chome,

Tomigaoka, Nara, Japan 22 Filed: Nov. 2, 1971 21 Appl. No.: 194,894

[30] Foreign Application Priority Data Jan. 115, 1974 3,497,149 2/1970LAllemand 242/46.21

Primary Examiner-George F. Mautz Attorney-A1vin Browdy et a1.

57 ABSTRACT In a bobbin. socket having a metal ring mounted between abobbin body and a socket body, said ring has such a substantially Sshape in vertical section that it can be integrally mounted to the upperand outer periphery of the socket body so as to protect the flangesurface of the socket body from plastic deformations and damages whichmight otherwise be caused by the forced pressure of the lowest peripheryof the bobbin body. Y

1 Claim, 2 Drawing Figures Dec. 4, 1970 Japan ..45/121345[U] Dec. 18,1970 Japan,..,.,..,.,,,. ,,,5/ L2@ Zftfl)j 52 us. or. 242/11s.31 [51]Int. Cl B6511 75/10 [58] Field of Search 242/118.31, 118.32, 242/118.3,118.61, 68.6, 46.21, 46.2, 46.3, 118

[56] References Cited UNITED STATES PATENTS 2,377,920 6/1945 Atwood242/1 18.31

7 lb q 1"", 7 l4 7 3 /7c 1 I /'\/)I /Z/'" 3/'\./\\

BOBBIN SOCKET The present invention relates generally to improvements ina socket provided with a substantially S shape metalring for a spinningbobbin or yarn carrier, and more particularly it relates to such animproved type of socket means having a substantially S shape verticallysectioned metal ring to be adapted between a metallic spinning bobbinportion and a synthetic resin socket portion so as to secure the tightlyconnected relation between the socket and the bobbin.

For the purpose of securing a tightened connection of a socket to aspinning bobbin body it is customary to employ such a socket that itsouter periphery is substantially same as, or a little greater than, theinner periphery of a lower bobbin portion thereby allowing the bobbinbody to be fixedly mounted to a spindle through the socket thereby toenable the bobbin to carry out a spinning operation synchronously withthe rotation of the spindle.

However, in order to tightly connect a socket body to a bobbin body, useis made for example of a hydraulic drive coupling means, a crank gearcoupling means or a lever coupling means thereby mechanically forcingthe socket portion into the bobbin portion so that the socket portionthus connected to the bobbin portion is easily pressed to undergoplastic deformations due to the great difference in strength between asocket material and a bobbin material. Consequently, in theabovementioned method it is practically impossible to obtain abobbin'body that can be located accurately in center with respect to thespindle that rotates at a very high velocity thereby to rotate thebobbin body in synchronism therewith.

Accordingly, in order to maintain a tightened connection of the socketbody to the bobbin body so as to locate the bobbin body accuratelyincenter with respect to thespindle, it is customary to provide anupside-down U shape metallic ring between the two bodies therebypreventing the plastic deformations of the socket portion which mightotherwise occur and at the same time enhancing the accuracy with whichthe bobbin body is kept in a concentric relation with respect to thespindle. I

However, when such an upside-down U shape ring is adapted for mountingthe socket body to the bobbin body, the upper and outer periphery of thesocket body along which said ring is mounted is formed smaller indiameter than the lower and outerperiphery of the socket body so thatwhen the socket body is mounted to the bobbin body through said ring,there is caused a gap in the intermediate area intervening between saidtwo peripheries, the result being that with the increased use of thistype socket body as a means for mounting the bobbin body to a spindle,the tightened connection between the socket body and bobbin body isgradually loosened whereby the bobbin body deviates from the accuratelycentered position with respect to the spindle, consequently failing tobring about a satisfactory spinning effect.

Furthermore, along with the tendency of recent years demanding for yarnpackages of a larger size, the metallic bobbin bodies have beenincreased in size so that especially when wound with a lower count yarn,the bobbin body becomes very heavy in weight as the whole.

Incidentally, in the case that such large-sized bobbin bodies to whicheach socket body is integrally mounted and on which a spinning yarn iswound to its maximum degree are manually handled for storage ortransported by a vehicle or the like to succeeding spinning processes,they are not only given a great shock when placed in a storing place butalso loaded henceforwards with unbearable dead weight in succession.Furthermore they must be subjected to incessant vibrations, swingingfrictions and impacts given thereto during the whole course of suchvehicular transportation. Thus the socket portions exposed to suchexternal forces are easily deformed or broken whereby the tightlyconnected relation between the socket body and the bobbin body isdisconnected, giving rise to the deficiency that the socket body cannotserve any more. In this case, it may be thinkable to eliminate theabovementioned deficiency by mounting a metallic ring to the socketportion so as to substantially remove or decrease the difference instrength of the material between the bobbin portion and the socketportion directly connected thereto. However, it has been proved thatsuch an upside down U shape ring serves only to strengthen the connectedrelation between the bobbin portion and the upside down U ring per sebecause of its configuration and the configuration of the bobbin portionwhich corresponds to the upside down U ring so that the connectingsurfaces of the socket portion to the bobbin portion are subjected tothe increasing frictions and plastic deformations because the socketmaterial is by far smaller in strength than the ring material and thebobbin material.

In view of all the above-mentioned difficulties and disadvantages, thepresent invention has been designed to eliminate the same by providingfor improvements in the conventional type of socket means for spinningbobbins.

Accordingly it is one of the main objects of the present invention toprovide a socket body rigidly capped with a metal ring of asubstantially S shape in vertical section thereby permitting the socketbody to be connected to a bobbin body in integral relation.

It is another object of the invention to provide a socket body cappedwith a metal ring which is adapted to receive the foremost end of abobbin body in spaced relation with a socket portion thereby to preventthe socket body from plastic deformations and damages.

With the above and other objects in view, which will become apparent inthe following detailed description, the present invention will beclearly understood in connection with the accompanying drawing, inwhich:

FIG. '1 is a vertical section of a socket means coupled with a bobbinbody which is shown with some parts broken away; and

FIG. 2 is likewise a vertical section of a conventional socket means inaccordance with the prior art.

Now referring to the drawing, reference numeral 10 designates a socketbody substantially composed of a plastic resin material. Said socketbody 10 is comprised of a lower and inner periphery 11 having aconnecting portion 12 to a spindle (not shown) substantially formed in apolygonal shape in cross section corresponding to the shape of the baseportion of said spindle, a lower and outer periphery 13 thereof, and anupper and outer periphery l4 thereof which is smaller in diameter thansaid periphery 13. Between said lower, outer periphery 13 and saidupper, outer periphery l4 respectively of the socket body there isformed a flange surface defining the demarcation therebetween. The upperedge of said upper and outer periphery 14 is adapted so as tosubstantially form an upward semi-circular portion 16 in verticalsection. Along the periphery of said upper edge thus formed there isfixedly mounted a J shape metal ring 17 subsequently described whichconstitutes the elemental part of the present invention.

Said metal ring 17 comprises a pair of inner and outer legs 17a, 170, acurved bridge 17b and an extension member 17d. Said inner leg 17a isformed to correspond with the upper and inner periphery of the socketbody 10 in contact therewith. Said outer leg 17c is longer in lengththan said inner leg 17a and is formed to correspond with the upper andouter periphery of the socket body 10 in opposed relation to said innerleg 17a. The curved bridge 17b has its both ends integrally terminatingto said legs 17a, 17c and is formed into a semi-circular shape so as tocorrespond to said upward semi-circular portion 16. The extension member17d extends outwardly from the lowest end of said outer leg 170 to anextent not exceeding the length by which said flange surface 15 extendsradially outward of said socket body 10. Accordingly, the metal ring 17thus formed presents a pair of substantially S shapes in verticalsection as clearly shown in FIG. 1.

The metal ring 17 thus formed is tightly capped on said upwardsemi-circular portion 16 of the socket body 10 and then rigidly fixedthereto by punching the ring on some selected points of the peripheralsurface thereof or in any other suitablefixing method.

A spinning bobbin body 18 may be of a conventional type of cylindricalor tubular form made from a metallic material, and comprises a lowerportion 18' having the inner diameter of substantially same as, or alittle smaller than, the outer diameter of the ring forming a truecircle in cross section, and is so formed as to exactly correspond tosaid upwardsemi-circular portion 16 tightly capped with the ring 17.

Therefore, when the socket body 10 and the bobbin body 18 respectivelyformed in the above-mentioned manner are forcibly connected to eachother for example by use ofa hydraulic drive coupling means, a crankgear drive coupling means or the like, the peripheral edge of the lowestbobbin portion is brought into contact with the upper surface of saidextension member 17d while the inner periphery of said said lower bobbinportion is brought into pressed abutment against the outer periphery ofthe ring so that the load of the yarn wound bobbin body which worksdownward in the axial direction thereof is firstly frictionally receivedby said outer periphery of the socket body and then receivedtherethrough the peripheral edge of the lowest bobbin portion which isbrought into abutment against the upper surface of the extension member17d. Furthermore, according to the metal ring 17 of the invention theextension member 17d is gently curved in the outward direction withoutcontacting the flange portion 15 as has been mentioned, thereby defininga space between the bottom surface of the extension member 17d and theflange surface 15 opposing thereto so that the outer periphery of thesocket body 10 is released from the whole load with which it mightotherwise be burdened, consequently preventing the flange surface 15from frictional deformations.

Incidentally, the cylindrical bobbin body 18 is obtained through theprocess in which a long length of metallic pipe formed in series is cutin one direction traversing the longitudinal axis thereof or along theouter periphery thereof thereby to form a plurality of desired lengths.Thus, with respect to the cross section of each cut length, at leastboth the outer semicircumference and the inner semi-circumferenceopposing thereto are burred in the cutting direction, or otherwise thewhole inner circumference of the length is burred along the cut edge.Due to the burrs thus formed, it is inevitable that the outer peripheryof the ring should be scratched by the inner periphery of the lowestbobbin portion when they are forcibly connected to each other,consequently making it quite impossible to secure such a tightenedconnection of the socket body to the bobbin body that can maintain thebobbin body in the exactly centered position with respect to thespindle.

Therefore, in order to eliminate the abovementioned deficiency it iscustomary that each edge of cut length is pared away as is shown inFIG. 1. In this case, in the conventional bobbin socket shown in FIG. 2which has an upside down U shape ring 17 mounted thereon, it will beeasily understood that the pared lowest peripheral end 19 is forciblyand directly thrusted into the socket flange 15, thus causing undesiredplastic deformations thereof. However, according to the presentinvention, the metal ring 17 capped on the upper peripheral edge of asocket body 10 shown in .FIG. 2 comprises two legs 17a, 17c, curvedbridge 17b and to extension member 17d gently curved at the end of saidleg 17c and extended outwardly in perpendicular relation thereto orradially outward of the socket body 10 so as to be spaced away from theflange surface 15 defining the demarcation between the upper, outerperiphery and the lower, outer periphery of the socket body 10 therebygiving a slight resiliency to said extension member 17d.

Accordingly, even if the upper surface of the extension member 17d isforcibly pressed by the aforesaid lowest end of the bobbin body 18 whichis pared off along the outer and inner peripheral edges thereof, it canresiliently receive said lowest end whereby the flange surface 15 of thesocket body 10 is always kept free from any deformations and damages.

The last but not the least, it is desirable that the extension memberl7d is provided substantially shorter in length so that when a sleeve 20is mounted onto the bobbin body 18 and the socket body 10 integrallyconnected thereto, the forward end of the extension member 17d shouldnot scratch the inner periphery of the sleeve 20.

In view of the above, several advantages of the present invention, it isto be understood that the above mentioned embodiment is given by exampleonly and not in a limiting sense.

I claim:

1. In a bobbin socket for holding a bobbin comprising a synthetic resincylindrical socket means, said socket means including coaxialcylindrical upper and lower portions, said lower portion having an outerperipheral surface diameter which is larger than the outer peripheralsurface diameter of said upper portion, a flange portion formed by thetop of said cylindrical lower portion and extending between the outerperipheral surfaces of said upper and lower portions in a concentricrelation therewith, a vertically semi-circular sectioned annular edgeportion formed on the top of the upper portion of said socket means, andan annular metal ring means covering said annular edge portion, theimprovement wherein said ring means comprises:

a vertically semicircular sectioned annular ring section correspondingin shape and extending circumferentially around said edge portion, anexternal ring section extending circumferentially around the outerperipheral portion of the upper section of said socket means, and aninternal ring section extending circumferentially around the innerperipheral portion of the upper section of said socket means, saidexternal ring section being substantially longer in length than saidinternal ring section and having an extension section extending radiallyoutward to an extent not exceeding the length by which said flangeportion .extends from the upper portion of said socket means, said ringmeans thereby forming as a whole a substantially S shape verticalcross-section, said extension section being formed to support on theupper surface thereof the lowest end of the bobbin and said externalring section being shorter in length than the length of said upperportion to define a space between the bottom surface of said extensionsection and the surface of said flange portion opposite to the bottomsurface of the bobbin.

1. In a bobbin socket for holding a bobbin comprising a synthetic resincylindrical socket means, said socket means including coaxialcylindrical upper and lower portions, said lower portion having an outerperipheral surface diameter which is larger than the outer peripheralsurface diameter of said upper portion, a flange portion formed by thetop of said cylindrical lower portion and extending between the outerperipheral surfaces of said upper and lower portions in a concentricrelation therewith, a vertically semi-circular sectioned annular edgeportion formed on the top of the upper portion of said socket means, andan annular metal ring means covering said annular edge portion, theimprovement wherein said ring means comprises: a verticallysemi-circular sectioned annular ring section corresponding in shape andextending circumferentially around said edge portion, an external ringsection extending circumferentially around the outer peripheral portionof the upper section of said socket means, and an internal ring sectionextending circumferentially around the inner peripheral portion of theupper section of said socket means, said external ring section beingsubstantially longer in length than said internal ring section andhaving an extension section extending radially outward to an extent notexceeding the length by which said flange portion extends from the upperportion of said socket means, said ring means thereby forming as a wholea substantially S shape vertical cross-section, said extension sectionbeing formed to support on the upper surface thereof the lowest end ofthe bobbin and said external ring section being shorter in length thanthe length of said upper portion to define a space between the bottomsurface of said extension section and the surface of said flange portionopposite to the bottom surface of the bobbin.